/*
 * Copyright © 2013 – 2016 Ricki Hirner (bitfire web engineering).
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 */

package com.etesync.syncadapter.ui.journalviewer

import android.accounts.Account
import android.content.Context
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.AdapterView
import android.widget.ArrayAdapter
import android.widget.ImageView
import android.widget.TextView
import androidx.fragment.app.ListFragment
import com.etesync.journalmanager.model.SyncEntry
import com.etesync.syncadapter.App
import com.etesync.syncadapter.R
import com.etesync.syncadapter.model.*
import com.etesync.syncadapter.ui.JournalItemActivity
import com.etesync.syncadapter.ui.ViewCollectionActivity
import org.jetbrains.anko.doAsync
import org.jetbrains.anko.uiThread
import java.util.concurrent.Future

class ListEntriesFragment : ListFragment(), AdapterView.OnItemClickListener {

    private lateinit var data: MyEntityDataStore
    private lateinit var account: Account
    private lateinit var info: CollectionInfo
    private var journalEntity: JournalEntity? = null
    private var asyncTask: Future<Unit>? = null

    private var emptyTextView: TextView? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        data = (context!!.applicationContext as App).data
        account = arguments!!.getParcelable(ViewCollectionActivity.EXTRA_ACCOUNT)!!
        info = arguments!!.getSerializable(EXTRA_COLLECTION_INFO) as CollectionInfo
    }

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        activity!!.title = info.displayName
        val view = inflater.inflate(R.layout.journal_viewer_list, container, false)

        //This is instead of setEmptyText() function because of Google bug
        //See: https://code.google.com/p/android/issues/detail?id=21742
        emptyTextView = view.findViewById<View>(android.R.id.empty) as TextView
        return view
    }

    fun loadEntries(): List<EntryEntity> {
        journalEntity = JournalModel.Journal.fetch(data, info.getServiceEntity(data), info.uid)
        return data.select(EntryEntity::class.java).where(EntryEntity.JOURNAL.eq(journalEntity)).orderBy(EntryEntity.ID.desc()).get().toList()
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        asyncTask = doAsync {
            val entries = loadEntries()

            uiThread {
                val listAdapter = EntriesListAdapter(context!!)
                setListAdapter(listAdapter)

                listAdapter.addAll(entries)

                emptyTextView!!.text = getString(R.string.journal_entries_list_empty)
            }
        }

        listView.onItemClickListener = this
    }

    override fun onDestroyView() {
        super.onDestroyView()
        if (asyncTask != null)
            asyncTask!!.cancel(true)
    }

    override fun onItemClick(parent: AdapterView<*>, view: View, position: Int, id: Long) {
        val entry = listAdapter?.getItem(position) as EntryEntity
        startActivity(JournalItemActivity.newIntent(context!!, account, info, entry.content))
    }

    internal inner class EntriesListAdapter(context: Context) : ArrayAdapter<EntryEntity>(context, R.layout.journal_viewer_list_item) {

        override fun getView(position: Int, _v: View?, parent: ViewGroup): View {
            var v = _v
            if (v == null)
                v = LayoutInflater.from(context).inflate(R.layout.journal_viewer_list_item, parent, false)!!

            val entryEntity = getItem(position)

            // FIXME: hacky way to make it show sensible info
            val info = journalEntity!!.info
            setJournalEntryView(v, info, entryEntity!!.content)

            val entryError = data.select(EntryErrorEntity::class.java).where(EntryErrorEntity.ENTRY.eq(entryEntity)).limit(1).get().firstOrNull()
            if (entryError != null) {
                val errorIcon = v.findViewById<View>(R.id.error) as ImageView
                errorIcon.visibility = View.VISIBLE
            }

            return v
        }
    }

    companion object {
        protected val EXTRA_COLLECTION_INFO = "collectionInfo"

        fun newInstance(account: Account, info: CollectionInfo): ListEntriesFragment {
            val frag = ListEntriesFragment()
            val args = Bundle(1)
            args.putParcelable(ViewCollectionActivity.EXTRA_ACCOUNT, account)
            args.putSerializable(EXTRA_COLLECTION_INFO, info)
            frag.arguments = args
            return frag
        }

        private fun getLine(content: String?, prefix: String): String? {
            var content: String? = content ?: return null

            val start = content!!.indexOf(prefix)
            if (start >= 0) {
                val end = content.indexOf("\n", start)
                content = content.substring(start + prefix.length, end)
            } else {
                content = null
            }
            return content
        }

        fun setJournalEntryView(v: View, info: CollectionInfo, syncEntry: SyncEntry) {

            var tv = v.findViewById<View>(R.id.title) as TextView

            // FIXME: hacky way to make it show sensible info
            val fullContent = syncEntry.content
            var prefix = ""
            when (info.enumType) {
                CollectionInfo.Type.CALENDAR, CollectionInfo.Type.TASKS -> {
                    prefix = "SUMMARY:"
                }
                CollectionInfo.Type.ADDRESS_BOOK -> {
                    prefix = "FN:"
                }
            }

            var content = getLine(fullContent, prefix)
            content = content ?: "Not found"
            tv.text = content

            tv = v.findViewById<View>(R.id.description) as TextView
            content = getLine(fullContent, "UID:")
            content = "UID: " + (content ?: "Not found")
            tv.text = content

            val action = v.findViewById<View>(R.id.action) as ImageView
            when (syncEntry.action) {
                SyncEntry.Actions.ADD -> action.setImageResource(R.drawable.action_add)
                SyncEntry.Actions.CHANGE -> action.setImageResource(R.drawable.action_change)
                SyncEntry.Actions.DELETE -> action.setImageResource(R.drawable.action_delete)
            }
        }
    }
}